GENERAL HISTOLOGY

MUSCLE

SKELETAL MUSCLE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What protein is wrapped around myosin that prevents it from contacting actin
A
Troponin
B
Tropomyosin
C
Calcium
D
None of the above
Explanation: 

Detailed explanation-1: -In a resting sarcomere, tropomyosin blocks the binding of myosin to actin.

Detailed explanation-2: -Thin Filaments The actin molecules contain active sites to which myosin heads will bind during contraction. The thin filaments also contain the regulatory proteins called tropomyosin and troponin, which regulate the interaction of actin and myosin.

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